.tmux.conf

set -g default-terminal "tmux-256color"

# Start windows and panes at 1, not 0
set -g base-index 1
set -g pane-base-index 1

# prefix
unbind C-b
set -g prefix C-Space
bind C-Space send-prefix

# renumber windows
set -g renumber-windows on

# no escape delay
set -s escape-time 0

# --- Define colour scheme --- #
_tmux_white=colour15
_tmux_black=colour232
_tmux_red=colour1
_tmux_purple=colour54
_tmux_grey_l=colour145
_tmux_grey_d=colour236
_tmux_blue=colour25
_tmux_blue_d=colour17
# ---------------------------- #

# Panes
set -g pane-active-border-style "fg=$_tmux_blue"
set -g message-style "fg=$_tmux_grey_l,bg=$_tmux_grey_d"
set -g pane-border-style "fg=white"
set -g display-panes-colour "black"
set -g display-panes-active-colour "white"

set -g pane-border-status "off"
set -g pane-border-format "[#[fg=white]#{?pane_active,#[bold],} :#P: #T #[fg=default,nobold]]"

# Auto hide pane-border-status line when only one pane is displayed (see tmux/tmux#566)
set-hook -g 'after-new-session'  'run-shell -b "if [ \#{window_panes} -eq 1 ]; then tmux set pane-border-status off; fi"'
set-hook -g 'after-new-window'   'run-shell -b "if [ \#{window_panes} -eq 1 ]; then tmux set pane-border-status off; fi"'
set-hook -g 'after-kill-pane'    'run-shell -b "if [ \#{window_panes} -eq 1 ]; then tmux set pane-border-status off; fi"'
set-hook -g 'pane-exited'        'run-shell -b "if [ \#{window_panes} -eq 1 ]; then tmux set pane-border-status off; fi"'
set-hook -g 'after-split-window' 'run-shell -b "if [ \#{window_panes} -gt 1 ]; then tmux set pane-border-status top; fi"'

# Messages
set -g message-command-style "fg=$_tmux_grey_l,bg=$_tmux_grey_d"
set -g display-time 5000

# focus events
set -g focus-events on

# increase history limit
set -g history-limit 30000

# remap next-layout for repeat
bind-key -r Space next-layout

# vim-like movement
unbind-key j
bind-key j select-pane -D
bind-key -r M-j resize-pane -D 5

unbind-key k
bind-key k select-pane -U
bind-key -r M-k resize-pane -U 5

unbind-key h
bind-key h select-pane -L
bind-key -r M-h resize-pane -L 5

unbind-key l
bind-key l select-pane -R
bind-key -r M-l resize-pane -R 5

# last window
bind-key ` last-window

# reload conf
bind-key r source-file ~/.tmux.conf

# new session prompt key
bind-key e command-prompt -p "Create new session:" "new-session -s %1"

# new session with current window - new session starts with a new window at index 1, so we kill it after moving
bind-key E command-prompt -p "Move to new session:" "new-session -d -s %1; move-window -t %1; kill-window -t %1:1; switch-client -t %1"

# vi mode-keys
set-window-option -g mode-keys vi
bind-key -Tcopy-mode-vi 'v' send -X begin-selection
bind-key -Tcopy-mode-vi 'y' send -XR copy-selection
bind-key -Tcopy-mode-vi 'V' send -X rectangle-toggle
unbind-key [
bind-key Escape copy-mode
bind-key -r C-n next-window
bind-key -r C-p previous-window
unbind-key p
unbind-key n
bind-key p paste-buffer

# system clipboard using xclip
bind-key -Tcopy-mode-vi 'Y' send -XR copy-pipe "xclip -i -sel c"

# new window at default path (home)
bind C neww

# open new window and pane in path of current window
bind c neww -c "#{pane_current_path}"
bind - split-window -c "#{pane_current_path}"
bind = split-window -h -c "#{pane_current_path}"
# unbind the defaults
unbind %
unbind '"'

# Alt binding for rotate
bind C-r rotate-window

# set terminal window title to session name
set -g set-titles on
set -g set-titles-string "#h:#S"

# notifications and bells
set -g bell-action any
set -g visual-bell off

# custom layout shortcuts
bind-key V select-layout even-vertical
bind-key H select-layout even-horizontal

# toggle mouse mode
bind-key m set mouse

# toggle pane synchronisation mode
bind-key S setw synchronize-panes

# rebind session and window tree to disable preview
bind-key s choose-tree -s -Z -N
bind-key w choose-tree -Z -N

# Move current window position left/right
bind-key -r > swap-window -t :+1
bind-key -r < swap-window -t :-1

# Status line

## Variables
_tmux_status_bg="#{?pane_in_mode,$_tmux_blue_d,#{?pane_synchronized,${_tmux_purple},${_tmux_blue}}}"
_tmux_prefix_on="#[fg=$_tmux_white,bg=$_tmux_status_bg,bold] #{?client_prefix,=, } "

## Line definition
set -g status-justify "left"
set -g status "on"
set -g status-left-style "none"
set -g status-right-style "none"
set -g status-style "fg=$_tmux_grey_d,bg=$_tmux_black,none"
set -g status-right-length "100"
set -g status-left-length "100"
setw -g window-status-activity-style "fg=$_tmux_red,bg=$_tmux_black,none"
set -g status-left "${_tmux_prefix_on}#[fg=$_tmux_white,bg=$_tmux_status_bg,bold]Session:#[nobold] #S${_tmux_prefix_on}#[fg=$_tmux_grey_d,bg=$_tmux_black]"
set -g status-right "#[fg=$_tmux_white,bg=$_tmux_status_bg]${_tmux_prefix_on}#h${_tmux_prefix_on}"
setw -g window-status-format "#[fg=$_tmux_white,bg=$_tmux_black] #{?window_last_flag,:, }#I#{?window_last_flag,:, }#[fg=$_tmux_grey_l,bg=$_tmux_black] #T #{?#{!=:#{window_panes},1},(#{window_panes}) ,}"
setw -g window-status-current-format "#[fg=$_tmux_white,bg=$_tmux_grey_d,bold] [#I] #T #{?#{!=:#{window_panes},1},(#{window_panes}) ,}#[fg=$_tmux_grey_l,bg=$_tmux_black]"
setw -g window-status-separator "┃"
set -g status-interval 1